ICU-22365 C API for ULocaleBuilder #378

Job	Run time
clang-valgrind-test	15m 46s
clang-valgrind-intltest (utility)	9m 0s
clang-valgrind-intltest (normalize)	9m 15s
clang-valgrind-intltest (collator)	6m 39s
clang-valgrind-intltest (regex)	7m 1s
clang-valgrind-intltest (format)	32m 28s
clang-valgrind-intltest (translit)	7m 28s
clang-valgrind-intltest (rbbi)	9m 6s
clang-valgrind-intltest (rbnf)	10m 39s
clang-valgrind-intltest (rbnfrt)	7m 46s
clang-valgrind-intltest (icuserv)	6m 10s
clang-valgrind-intltest (idna)	6m 15s
clang-valgrind-intltest (convert)	8m 11s
clang-valgrind-intltest (rbnfp)	7m 17s
clang-valgrind-intltest (csdet)	7m 21s
clang-valgrind-intltest (spoof)	8m 44s
clang-valgrind-intltest (bidi)	9m 20s
	2h 48m 26s

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